Multiserver setup debugging

I have setup multiserver installation - 4 ispconfig installations in separate OpenVZ containers on one physical host. One installation is master and 3 others for apache, mail and dns. I can see from ispconfig all 4 servers.

The problem is that newly created mailbox (the same is with websites) is not physically created in the mail server. Database records are created in master's database and not in mail server database. I suppose this is not normal, and records must be created in mail server database also. There is nothing in /var/log/ispconfig dirs in both servers, cront jobs are working and I checked mysql connections in config.inc.php, which are also ok. How to find whats wrong?